Marie Archer

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Potentially eventually positive (PEP) sign patterns were introduced in “Sign patterns 1 that allow eventual positivity,” Electronic Journal of Linear Algebra, 19 (2010): 108–120, where it 2 was noted that A is PEP if its positive part is primitive, and an example was given of a 3× 3 PEP 3 sign pattern with reducible positive part. We extend these results by(More)
A new specimen of the bizarrely specialised Malleodectes mirabilis from middle Miocene deposits in the Riversleigh World Heritage Area provides the first and only information about the molar dentition of this strange group of extinct marsupials. Apart from striking autapomorphies such as the enormous P3, other dental features such as stylar cusp D being(More)
We introduce the study of potentially eventually exponentially positive (PEEP) sign patterns and establish several results using the connections between these sign patterns and the potentially eventually positive (PEP) sign patterns. It is shown that the problem of characterizing PEEP sign patterns is not equivalent to that of characterizing PEP sign(More)
“Most recently, an isolated M2 or M3 has been ascribed to a new genus and species, Whollydooleya tomnpatrichorum from Whollydooley Site on Whollydooley Hill, west of the Riversleigh World Heritage Area20. While the deposit has not been dated, factors discussed in that paper suggest it could be late Miocene in age. Whollydooleya tomnpatrichorum shares a few(More)
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